US 6,663,758 B2 · Method and apparatus for producing electrolytic copper foil

Abstract

An electrolytic copper foil is electrodeposited onto the cathodic drum surface of a rotating cathode drum by feeding an electrolytic solution between the cathode drum and an anode facing each other and applying direct current between them, while the initial formation of the crystal nuclei of the electrolytic copper foil is performed by providing an auxiliary anode, an electrolytic solution receiver and a flashboard above the anode and applying an electric current between the cathode drum and the auxiliary anode and feeding an electrolytic solution separately onto the cathodic drum surface from an electrolytic solution feeder placed near the auxiliary anode and discharging it through the gap between the cathodic drum surface and the edge of the electrolytic solution receiver, keeping an electrolytic solution holdup between the cathodic drum surface and the auxiliary anode by the electrolytic solution receiver and the flashboard.

Claims17

Dependent claims

A method of producing electrolytic copper foil, comprising

applying a direct current between a rotating cathode drum having a cathodic drum surface and an anode, which has an arcuate section and faces the cathodic drum surface to define a gap between them, while an electrolytic solution is being fed to the gap to electrodeposit electrolytic copper foil on the cathodic drum surface;
and
applying a direct current between the rotating cathode drum and an auxiliary anode, which is mounted together with an electrolytic solution receiver and a flashboard above the anode having an arcuate section, while an electrolytic solution is being fed onto the cathodic drum surface from an electrolytic solution feeder provided near the auxiliary anode and is being discharged through a gap between the cathodic drum surface and an edge of the electrolytic solution receiver while keeping an electrolytic solution holdup between the cathodic drum surface and the auxiliary anode by the electrolytic solution receiver and the flashboard.

An apparatus for producing an electrolytic copper foil by applying a direct current between a rotating rotary cathode drum having a cathodic drum surface and an anode, which has an arcuate section and faces the cathode drum to define a gap between them, while an electrolytic solution is being fed to the gap to electrodeposit electrolytic copper foil on the cathodic drum surface, comprising

the rotary cathode drum having the cathodic drum surface;
the anode, which has an arcuate section and faces the cathodic drum surface to define a gap therebetween;
a means of feeding the electrolytic solution to the gap between the cathodic drum surface and the anode;
an auxiliary anode facing the cathodic drum surface above the anode having an arcuate section;
an electrolytic solution feeder for feeding an electrolytic solution between the cathodic drum surface and the auxiliary anode;
and
an electrolytic solution receiver and a flashboard which are placed above the anode having an arcuate section so as to keep an electrolytic solution holdup between the cathodic drum surface and the auxiliary anode;
a gap being left between the upper end of the anode having an arcuate section and an underside of the electrolytic solution receiver, and a gap being left between the cathodic drum surface and an edge of the electrolytic solution receiver.

5 more elements

Dependencies are inferred from the claim text.

Method and apparatus for producing electrolytic copper foil

Life of this patent

Method and apparatus for producing electrolytic copper foil

Life of this patent

Abstract

Claims17